CA2257757A1 - Method and apparatus for fabricating very small two-colour balls for a twisting ball display - Google Patents

Method and apparatus for fabricating very small two-colour balls for a twisting ball display Download PDF

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Publication number
CA2257757A1
CA2257757A1 CA002257757A CA2257757A CA2257757A1 CA 2257757 A1 CA2257757 A1 CA 2257757A1 CA 002257757 A CA002257757 A CA 002257757A CA 2257757 A CA2257757 A CA 2257757A CA 2257757 A1 CA2257757 A1 CA 2257757A1
Authority
CA
Canada
Prior art keywords
carrier fluid
fabricating
small
pigment
ball display
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA002257757A
Other languages
French (fr)
Other versions
CA2257757C (en
Inventor
Edward A. Richley
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Xerox Corp
Original Assignee
Xerox Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Xerox Corp filed Critical Xerox Corp
Publication of CA2257757A1 publication Critical patent/CA2257757A1/en
Application granted granted Critical
Publication of CA2257757C publication Critical patent/CA2257757C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2/00—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic
    • B01J2/02—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic by dividing the liquid material into drops, e.g. by spraying, and solidifying the drops
    • B01J2/04—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic by dividing the liquid material into drops, e.g. by spraying, and solidifying the drops in a gaseous medium
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B9/00—Making granules
    • B29B9/10—Making granules by moulding the material, i.e. treating it in the molten state
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
    • G02B26/02—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the intensity of light
    • G02B26/026—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the intensity of light based on the rotation of particles under the influence of an external field, e.g. gyricons, twisting ball displays
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
    • G09F9/37—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements being movable elements
    • G09F9/372—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements being movable elements the positions of the elements being controlled by the application of an electric field

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Molecular Biology (AREA)
  • Optics & Photonics (AREA)
  • Theoretical Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Mechanical Engineering (AREA)
  • Electrochromic Elements, Electrophoresis, Or Variable Reflection Or Absorption Elements (AREA)
  • Processes Of Treating Macromolecular Substances (AREA)
  • Glanulating (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)
  • Artificial Filaments (AREA)

Abstract

A bichromal ball includes a first hemisphere.
The first hemisphere includes a first pigment having a first color and a first polarity. The first pigment is added to a carrier fluid and polymer mixture during formation of the bichromal ball. A second hemisphere includes a second pigment having a second color and a second polarity. The second pigment is added to the carrier fluid and polymer mixture during formation of the bichromal ball. The carrier fluid and polymer mixture have a lower viscosity than the polymer alone. The carrier fluid is substantially removed after the first and second hemispheres are formed. The polymer is left along with the first and second pigments which form the bichromal ball.
A diameter of the bichromal ball is reduced after the carrier fluid is substantially removed.
CA002257757A 1998-01-09 1999-01-04 Method and apparatus for fabricating very small two-colour balls for a twisting ball display Expired - Fee Related CA2257757C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US09/005,372 1998-01-09
US09/005,372 US5900192A (en) 1998-01-09 1998-01-09 Method and apparatus for fabricating very small two-color balls for a twisting ball display

Publications (2)

Publication Number Publication Date
CA2257757A1 true CA2257757A1 (en) 1999-07-09
CA2257757C CA2257757C (en) 2002-04-30

Family

ID=21715517

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002257757A Expired - Fee Related CA2257757C (en) 1998-01-09 1999-01-04 Method and apparatus for fabricating very small two-colour balls for a twisting ball display

Country Status (5)

Country Link
US (1) US5900192A (en)
EP (1) EP0929060B1 (en)
JP (1) JP4143199B2 (en)
CA (1) CA2257757C (en)
DE (1) DE69901265T2 (en)

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JP2001066643A (en) * 1999-07-23 2001-03-16 Xerox Corp Device for manufacturing bichrome element
US6485280B1 (en) * 1999-07-23 2002-11-26 Xerox Corporation Methods and apparatus for fabricating bichromal elements
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US6545671B1 (en) 2000-03-02 2003-04-08 Xerox Corporation Rotating element sheet material with reversible highlighting
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US6504525B1 (en) 2000-05-03 2003-01-07 Xerox Corporation Rotating element sheet material with microstructured substrate and method of use
US6822781B1 (en) 2000-10-24 2004-11-23 Cabot Corporation Gyricon displays containing modified particles
US6524500B2 (en) * 2000-12-28 2003-02-25 Xerox Corporation Method for making microencapsulated gyricon beads
US6690350B2 (en) 2001-01-11 2004-02-10 Xerox Corporation Rotating element sheet material with dual vector field addressing
US6903719B2 (en) * 2001-01-26 2005-06-07 Xerox Corporation Rotation and threshold mechanism for twisting ball display
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Also Published As

Publication number Publication date
US5900192A (en) 1999-05-04
JPH11342548A (en) 1999-12-14
EP0929060A3 (en) 2000-05-10
EP0929060B1 (en) 2002-04-17
EP0929060A2 (en) 1999-07-14
JP4143199B2 (en) 2008-09-03
DE69901265T2 (en) 2003-03-13
CA2257757C (en) 2002-04-30
DE69901265D1 (en) 2002-05-23

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